Billie Eilish wowed at the 2021 GRAMMYs on Sunday with a performance of her hit, "Everything I Wanted." The 19-year-old singer's somber tune is up for three GRAMMYs this year -- Record of the Year, Song of the Year, as well as Best Pop Solo Performance.
Eilish, along with her collaborator and brother Finneas, took the stage -- which was set up in the round with fellow performers like Harry Styles and Haim watching off to the side -- for a more relaxed vibe on music's biggest night.
Dressed in matching bedazzled suits, Eilish and Finneas aced the melancholic, moody performance like seasoned pros. As Eilish stood atop a car as she crooned her way through the song, Finneas parked himself in the back to back up his little sis.
After they ended their stellar performance, Styles was seen applauding the siblings.
"It's quite a ride, that year," director R.J. Cutler shared with ET, explaining how he and a minimalist crew embedded themselves with Eilish and her family for over 140 days over the course of about one year -- and ended up tracking her through the release of her massively successful debut album, When We All Fall Asleep, Where Do We Go?, all the way to GRAMMY night in 2020.
Watch the video below to see the biggest revelations from the documentary.